Move to frostfs-node

Signed-off-by: Pavel Karpy <p.karpy@yadro.com>

cmd/frostfs-node/config/internal/env.go

@@ -0,0 +1,22 @@
+package internal
+
+import (
+	"strings"
+)
+
+// EnvPrefix is a prefix of ENV variables related
+// to storage node configuration.
+const EnvPrefix = "neofs"
+
+// EnvSeparator is a section separator in ENV variables.
+const EnvSeparator = "_"
+
+// Env returns ENV variable key for a particular config parameter.
+func Env(path ...string) string {
+	return strings.ToUpper(
+		strings.Join(
+			append([]string{EnvPrefix}, path...),
+			EnvSeparator,
+		),
+	)
+}